Tender feed water heater



Aug. 4,, 1931.

c. A SCHELLENS TENDER FEED WATER HEATER Filed June 30, 1926 INVENTOR Q/R/WM/ER A. SCHELLEA/S A TTORNEYS Patented Aug. 4, 1931 PATENT oF -lcg J RS Y" cI'r'Y, new JERSEY, A conrona'rrou or TENDER FEED wanna HEATER Application filed June 30,

This invention relates to locomotive feed water heaters and has for its primary object the provision ofsimple and effective means for heating the feed water, particularly. designed to meet certain operating difficulties which arise in service.

' Another object of the invention is to provide a combination of feed water heating devices calculated to meet conditions which arise byvi-rtue'of physical limitations as to size as will further appear.

A more specific object of the invention is v to supplement the primary heater, which advantage in the tender.

is usually placed somewhere on the locomotiveand in this instance islocated at the front end, by means of, a simple feed water tender shown in section and with my invention shown applied thereto;

Fig. 2 is an enlarged longitudinal section thru the tender feed water heater. which I employ; and 7 I Fig. 3 is a plan section taken on the line 3-3 of Fig. 2. a

Although feed water heaters of the usual type are provided with heating surfaces which are ample-when the heater is clean it is ipointed out that in service the heater be- CQm cQW ed t dir an il hidr a y impairs its effectiveness. j The natural thought therefore would be to increase the amount of heating surface to the point where the heater would be eflic-ienteven whenfdirty, but this isobjectionable due to physical limitationsas to size of the heater, with which those skilled in the art are familiar; I I aim to offset the loss incident to the accumulation :of "dirt in the usual heater by providing a simp e oheats i e etd n th t nd w d 1926. se ial No, 119,630.

is adapted to supplement the main heater, which has the same effect as increasing the heating surface of the main heater, in that the tender heater provides a reserve heating capacity which is especially useful when the main heater becomes covered with dirt. By this arrangement the highest temperatures of thefeed water are obtained.

Referring now more particularly to 1 it willbe seen that I have therein indicated a locomotive l carrying at its forward end 5 a feed water heater .6 which is supplied with steam, preferably exhaust steam frointhe main cylinders of the locomotive, thrn the medium of the pipe or pipes -7. Exhaust steamfrom other appliances of thelo cemh tive, such for example as the airpum nmay alsobe admitted to the heater thru the pipe 8. Water is supplied to the heater in a manner to be hereinafter described, and the heated water is led from the heater 6 to the locomotive boiler by means of thep-ipe 9 and the boiler check 10. v i i The exhaust steam and condensate of the heater 6 is led haclrwardly to the tender feed water heater 11 by means of the pipe line 12 a check valve 13 being provided in this pipe line to prevent the water in the tender from flo nto the i i Referring now to Figs. 2 and 8 the tender feed waterheater 11 comprises a casing 14, preferably of cylindrical form, having an annular steam chamber 15 at its lower portion withwhich the'pipe line 12 communicates and a pump suction or water withdrawal orifice 16 thru which water is drawn from the tender. 7

The heater l1 is preferably located in the lower forward portion of the tender, the easing 14: thereof being spaced somewhat from the bottom of the tender so as to provide the space or restricted passageway 17thereunder, thrn which the water to be heated is passed as will further appear. i

. A plurality of holes 1 8'are provided in the bottom ofthe steam chamber 15 thru which the steam discharges for the purposeof heating the water ,passing gfroin the tender to the r fi n m 1 V a A i en ovablestrainer is provided around Water line 20.

the orifice 16 for the purpose of preventing any large pieces of coal or other matter from passing into the pipe line 20. This strainer also, in a measure serves to deflect the water current upward so that bubbles of air will be less likely to be drawn through the feed water pump 21 which pump is located in the A tank valve20a for controlling the water leaving the tender is located at any conven ient point in the pipe line 20 and in this instance I have shown it located at the suction, end of the pipe line 20. This valve is shown in itsclosed position in Fig.2.

The operation of the device is as follows. The exhaust steam together'with the condensate of the main heater 6 passes thru the pipeline 12 to the steam chamber 15 ofthe' tender heater 11 from which it discharges thru the holes 18 into the Water passing thru the passageway 17 VVater -is drawn from the tender. thru the passageway 17 to the suction orifice 16 and into'the water line20 by means. of. the pump'21, from which it is delivered to the main heater 6. Thus it will be seen that the water passes directly across able in view of the fact that corrosion'in the steam issuing from the steam ring of the heater andfis consequently heated by said steam. It is to be observed that by'thi's arrangement-the water being drawn by the pump is heated without imparting a sensible amount of its heat to the remaining water in the tender; In this connection it is point edo utthat thelcasing 14, which has an open bottom, surrounds the orifice 16 thus serving the purpose of preventing currents of hot water which escape the suction from the orifice from rising and mixing with the body of I water in the tender. The tender heater also. acts to deaerate the water before it enters the pump, an effect which is especially desirthe boiler is accelerated when there is. air in solution in the feed water supplied to the boiler. v r f The tank valve 20a as here shown has an actuating rod 20bextending upwardly thru.

anenclosing tube 22 and is provided with a handle 28. whereby it may be manipulated by the engineman. The tube 22 is secured in any suitable manner to the heater casing 14 and is of such diameter as to permit the valve to be drawn therethrough. "This tube terminates a little short of the top of the tender .for the purpose of permitting any gas which may enter with the steam to rise and "pass out at the top thereof.

-' In the preferred'arrangement of my in" vention I combine this tender heater device withthe usual heater indicated at 6 and in thiscombination the water is first warmed in .the tender heaterand. then pumped directly into the, usual heater. It is 'of cour'se evident that this tenderheating device can be used however, without the other or so called usual heater inwhich case low pressure steam is to be taken directly from the cylinders and the water pumped directly to the check Valves. I r

V A further advantage of this arrangement of apparatus is that when both heaters are used together it does away with the necessity fora steam trap and the heating ina closed heater is improved by the rapid circulation of steam thru it, which steam passes directly into the tender heater. If thiscondensate andsteam were to be blown directly'into' the suction line it'is evident that when the pump stops, the suction line would become filled with steam and non-condensible gases and upon starting it would be found to be steam bound.

From the foregoing it will be seen that in general the tender. heater may be described as an arrangement for heating feed water in a locomotive wherein exhaust steam or a mixture of exhaust steamand condensate is led tothe tender in a manner to heat the water locally and whereby this heated water is drawn off without sensibly dissipating heat to the body of water in the tender.

I claim V x tender and its water withdrawal orifice of a heater casing associated with the orifice and adapted to segregate that portion of the water in the immediate zone of the orifice from the remainder of the water in the tender, and means for d scharging through SillCl casing a heating medium into direct contact with 1. The "combination with a locomotive the water as it passes to said zone for .disv charge through the withdrawal orifice.

2. The combination" with a locomotive tender'and its water withdrawal orifice of a heater casing associated with the orifice spaced somewhat above the floor of the tender to provide a restricted passage thru which water must flow from the tender to'the ori fice, and means for introducing a heating medium into said heater casing,'said heater and a heating chamber mounted to surround said orifice and produce local heating of the feed water in its passage from the tender to said orifice, saidheating chamber having an" inlet for a heating'medium and an Outlet for discharging the heating medium directly into the water passing to said orifice.

5. A locomotive feed water heater for tenders having a water withdrawal orifice, and a heating chamber spaced above the floor ofthe tender for producing local heating of the feed water in its passage from the tender to said orifice, the local heater having outlets for the discharge of the heating medium directly into the water and said heater being annularly disposed around the orifice.

6. A locomotive feed water heater for tenderscomprising an inlet for admitting exhaust steam and condensate to the tender and a suction outlet for withdrawing water from the tender, said inlet and outlet being so disposed relative to one another that the water heated by the steam is withdrawn without sensibly dissipating'heat to the remaining body of water in'the tender, together with a vent whereby non-condensible gases and excess steam may escape.

7 A locomotive feed water heater for tenders having aavater withdrawal orifice, comprising a heatmg device 1n the form of a a hood within the tender and spaced above said orifice, and means for discharging a heating medium into the spacebetween the orifice and hood, said heating medium being entrained with the water as the water passes through said space to the water withdrawal orifice, together with a vent for said hood.

9. A locomotive feed Water heater for tenders having a water withdrawal orifice, comprising a heating device located in close proximity to the orifice and having means i for discharging its heating medium into the water substantially at the withdrawal orifice whereby said heating medium is entrained with the water passing to the orifice.

10. The combination of a locomotive feed water heater for tenders having a water withdrawal orifice, comprising a chamber within the tender having steam inlet and outlet, said chamber being so located with respect to the withdrawal orifice that steam discharging from the chamber contacts with water passing tothe orifice, a vent associated with said chamber for the escape of air present as an incident to operation; a steam heated feed water heater outside of said tender, and a connection between said outside heater and r the aforesaid steam inlet whereby exhaust steam from the outside heater is supplied as the heating medium for the inside heater.

11. The combination of a locomotive feed water heater for tenders having a water withdrawal orifice, comprising an open bottomed annular casing located over said orifice and concentric therewith, an annular chamber in said casing having a steam inlet and a plurality of annularly arranged steam outlets for discharging steam into the water passing to the withdrawal orifice, a vent for the escape of air from said casing; a steam heated feed water heater outside of the tender; and a connection between said outside heater and the aforesaid steam inlet whereby exhaust steam from the outside heater is supplled as the heating medium for the inside heater.

12. The combination with a locomotive tender and its feed water outlet, of means fordrawing water through the outlet, and means employing steam for heating the water being drawn only at a point immediately adacent the outlet, by direct contact with the steam, and including a shallow vented dome in alignment with the outlet and spaced slightly above the floor of the tender to provide water flow space to the outlet.

13. In combination with a locomotive and its tender provided with a feed water outlet, a main feed water heater on the locomotive, means for supplying steam to such heater, a heater within the tender and segregating a portion of the water therein adjacent the outlet, a pipe leading from the main heater to the heater in the tender and serving as an exhaust steam outlet and drain for the former and steam supply pipe for the latter, and a vent for the heater in the tender, whereby the main heater vents through the tender heater.

14. In combination with a tender and its water outlet, a feed water heater device including a relatively small chamber communicating with said outlet, open at the bottom and spaced slightly from the tender bottom, a vent-pipe extending from said chamber to a point above the tender water level, and means for discharging a heating medium into the water adjacent the lower peripheral edge of said chamber.

In testimony whereof, I have hereunto signed my name.

GHISTOPHER A. SCHELLENS. 

